The Redistributor has a single Q-Channel input that is used to ensure that the Redistributor can be safely clock gated hierarchically.
If the Redistributor is busy, actively processing interrupts or sending messages up or downstream, the Q‑Channel denies a quiescence request, qreqn, by asserting the qdeny signal. For more information, see the AMBA® Low Power Interface Specification, Arm® Q‑Channel and P‑Channel Interfaces.
The qreqn input is synchronized inside the Redistributor.
The qactive signal is connected to the PPI wires directly, and must be considered as an asynchronous output.